NAME
    List::Rank - Ranking of list elements

VERSION
    This document describes version 0.004 of List::Rank (from Perl
    distribution List-Rank), released on 2023-11-23.

SYNOPSIS
    Return the ranks of the elements if sorted numerically (note that equal
    values will be given equal ranks):

     my @ranks = rank 10, 30, 20, 20; # => 1, 4, "2=", "2="

    Return the ranks of the elements if sorted ascibetically:

     my @ranks = rankstr "apricot", "cucumber", "banana", "banana"; # => 1,4,"2=","2="

    Return the ranks of the elements if sorted by a custom sorter:

     my @ranks = rankby {length($a) <=> length($b)}
         "apricot", "cucumber", "banana", "banana"; # => 3, 4, "1=", "1="

    Return the ranks of records (taken from Sort::Rank's Synopsis):

     my @ranks = rankby {$b->{score} <=> $a->{score}} (
         {   score   => 80,  name    => 'Andy'       },
         {   score   => 70,  name    => 'Chrissie'   },
         {   score   => 90,  name    => 'Alex'       },
         {   score   => 90,  name    => 'Rosie'      },
         {   score   => 80,  name    => 'Therese'    },
         {   score   => 10,  name    => 'Mac'        },
         {   score   => 10,  name    => 'Horton'     },
     ); # => ("3=", 5, "1=", "1=", "3=", "6=", "6=")

    Sort the list numerically and return the elements as well as ranks in
    pairs:

     my @res = sortrank 10, 30, 20, 20; # => 10,1, 20,"2=", 20,"2=", 30,4

    Sort the list ascibetically and return the elements as well as ranks in
    pairs:

     my @res = sortrankstr "apricot", "cucumber", "banana", "banana";
         # => "apricot",1, "banana","2=", "banana","2=", "cucumber",4

    Sort the list by a custom sorter and return the elements as well as
    ranks in pairs:

     my @res = sortrankby {length($a) <=> length($b)} "apricot", "cucumber", "banana", "banana";
         # => "banana","1=", "banana","1=", "apricot",3, "cucumber",4

FUNCTIONS
  rank
  rankstr
  rankby
  sortrank
  sortrankstr
  sortrankby
HOMEPAGE
    Please visit the project's homepage at
    <https://metacpan.org/release/List-Rank>.

SOURCE
    Source repository is at <https://github.com/perlancar/perl-List-Rank>.

SEE ALSO
    Sort::Rank also accomplishes the same thing, but by default it expects
    an arrayref *of hashrefs* with key "score" in each hashref. To process a
    list of scalars, you need to supply a coderef to supply the scores.
    Another thing is, the module does not provide a way to sort by a custom
    order.

AUTHOR
    perlancar <perlancar@cpan.org>

CONTRIBUTING
    To contribute, you can send patches by email/via RT, or send pull
    requests on GitHub.

    Most of the time, you don't need to build the distribution yourself. You
    can simply modify the code, then test via:

     % prove -l

    If you want to build the distribution (e.g. to try to install it locally
    on your system), you can install Dist::Zilla,
    Dist::Zilla::PluginBundle::Author::PERLANCAR,
    Pod::Weaver::PluginBundle::Author::PERLANCAR, and sometimes one or two
    other Dist::Zilla- and/or Pod::Weaver plugins. Any additional steps
    required beyond that are considered a bug and can be reported to me.

COPYRIGHT AND LICENSE
    This software is copyright (c) 2023, 2018 by perlancar
    <perlancar@cpan.org>.

    This is free software; you can redistribute it and/or modify it under
    the same terms as the Perl 5 programming language system itself.

BUGS
    Please report any bugs or feature requests on the bugtracker website
    <https://rt.cpan.org/Public/Dist/Display.html?Name=List-Rank>

    When submitting a bug or request, please include a test-file or a patch
    to an existing test-file that illustrates the bug or desired feature.